What is Affirm?

Legal Definition
Practice. 1. To ratify or confirm a former law or judgment, as when the supreme court affirms the judgment of the court of common pleas. 2. To make an affirmation, or to testify under an affirmation.
-- Bouviers Law Dictionary
Legal Definition
To ratify, make firm, confirm, establish, reassert. To ratify or confirm a former law or judgment. Cowell. In the practice of appellate courts, to affirm a judgment, decree, or order, is to declare that it is valid and right, and must stand as rendered below ; to ratify and reassert it; to concur in its correctness and confirm its efficacy. In pleading. To allege or aver a matter of fact; to state it affirmatively; the opposite of deny or traverse. In practice. To make affirmation; to make a solemn and formal declaration or asseveration that an affidavit is true, that the witness will tell the truth, etc., this being substituted for an oath in certain cases. Also, to give testimony on affirmation. In the law of contracts. A party is said to affirm a contract, the same being voidable at his election, when he ratifies and accepts it, waives his right to annul it, and proceeds under it as if it had been valid originally.
-- Black's Law Dictionary
Legal Definition
To confirm a former judgment or order of court. See, also, Affirmation.
-- Ballentine's Law Dictionary